Immersion heater



, ing thehe'at away ata high enoughl rate.

.Patented Ocean, 1.9128. l Y p y lJNlTED STATES-.PATENT- o-FFICE. y

v FRANCIS F. GAGELMAN, or NEW YoRizfNf Y.

' IMMERSION HEATER.

Application lfiled November 22, 1926. Serial No. 149,999.4

The" invention relates to new and useful of a bi-metallic strip 5 firmly fastened to the improvements in immer'sionheaters and the linsulating base 7 vby screwi19 and nut 10 and 'objects of the improvements are :'"*-*-\with spacer 16, thus holding it in suspension.

First, to provide an elect-ric heater anda The Contact Got suitable contact substancel 5 thermostat complete in the same'v compartis riveted to 'the' opposite end of the strip 5 ment with theunecessary'out-going conductors and Contact 1s made to va headless screw 11 for electric connection. consisting ofproper metal for making andv -Second,to provide protection against burnbreaking electric currents or with proper tip out of the heating element should the surfor makinor and breaking 'electric currents inrounding substance be incapable of conducttermittenty:

ature adjustments and maybe locked in any Third, .to provide -an immersion heater of position by imeans of nut 20, which also holds such'nature as to increase, and automatically terminal lliin place. The insulating base 7:

maintain, the temperature of a body ot liquid to a desired value. l i i I Fourth, to provideanimmersion heater of in a verticalposition in order that the arc as simple design and construction as possible Which 1s broken at contact 6 maybe extinto obtainit-he desiredresult. -guishedymore quickly,`thus allowing longer Fifth, to provide an immersion heater of life for the tips. such construction as to be especiallyv adapt'- able for heating aquariums and watering trical insulating-properties and is fastened troughs'for live stock, but not limited to these to the inner portion of thescasing to elimi-4 usesl. n l o nate possibilities of' electrical ground or The above and other features will be'better Short circuit in `case of' extreme heat at the understood by referring to the.accompany-Ythermostal ing drawings. Figf` 1 is a longitudinal-section while Fig. 2Lis a section AA of 'Fig 1. not taken up bythe parts described or shown Fig. 3 is a cross section of the thermostat in vin the drawings 'H123' be filled with air or any projection'to the plan View. 4 'Substance provi e The housing 2 in lFig. 14 consists of thin `'sulating and heat conductin properties. gauge cylindrical tubing' with end caps 12 To lead 15 of the heater e ement and terand 18 made fast to the ends, thus rendering minal 17 of the thermostat are .connected is of suficient width to itsnugly in thecasthe whole v compartment water-tight. The `'IWO Wires from a cable 8 which extendsv thin wall of tliehousingallows .the heat to 'through the metal tube 9 to a suitable conbe transferred from the heating elementto Lvenience plug.' Over'the insulated cable 8 v theliquid very, rapidly so that the-,rest of the' is slipped' a tube 1 of suitable material, thicki i' compartment`- has the same temperature as ness and length, to protect cable 8 against inthat of the surrounding liquid. v ".-jury of the metal tube 9 and to make the end Toend cap l18 is connected a metal tube 9 ofthe metal tube Water-tight T0 the Wires bent into the form of an vL and extended to in cable v8 which is extended toy convenient aconvenient length. length, Located in. on-end of the housing is the ma ing it possibleto connect heating .element 4 consisting of any suitable 'Socket or convenience outlet. form of electric resistancedevce for trans- The entireexterior'metal housing and tube ing Without further supports and is located The insulation strip 21 has suitable elec-v y t e k9 I i I' The remaining space 1n the'compartrnent the proper electric in-y is connected a standardplug, thus.' to any standard The screw is used for temperheating means is shown by resistance wire a detrimental effect upon the fsubstance in t wound on a. porcelain spooland covered by which the-heater is immersed or to protect enamel or the likes. A notch is provided at' the heater'against injurious substances. one end, of the porcelain; spool for allowing I am aware that prior to my invention imand connected to terminalll. Surrounding trolled automatically by thermostats.

. the heating element 4isa layer of material 8 I therefore ,do not claim lsuch a combina- \,with suitable electrical insulating properties.- tion broadly; butI claim `and desire to se- Adjaeenttolthe heating 'element vwithneccure by Letters Patent;

55 essaryinterveningspace 1s located the'th'er- 1. In a. heater for liquid, a substantially mostat. The V'thermostat'.ic, element consists cylindrical casing, a heating unit in one end 50 'lead 13 to. be extended through theinside, mersionheaters have been made and con-- loo. mitting electrical energy into heat. Such are'coatedl withsuitable coating to prevent l a thermostatic device in said circuit and in the other end ofthe casing, said device in-",

cluding a supporting block of insulating material frictionallybraced along a substantial diameter between the walls of the casing.

2. In a heater for liquid, a substantially cylindrical casing, a heating unit in one end t ereof, and an electric circuit therefor and a thermostatic device in said circuit and in the other end of the casing, said device comprising a supporting block of insulati'ga terial frictionally braced along a substantial dia-meter between the walls of the casing, a pair oflongitudinally spaced terminals on the midportion of said block and hence along the axis of said cylinder, and a .bi-metallic circuit controller extending longitudinally from one of said terminals to the other;

whereby the entire thermostatic device is self-supported within the casing with the controller and the terminals thereof safely spaced from the walls of the casing.'

3. In a heater for liquid, a substantially cylindrical casing, a bi-metallic thermostatic clrcuit cont-roller in the casing and comprising an unbent conducting element arranged so as to be safely spaced from thev Walls thereof, and supporting means for said controller element, said supporting means comprising a block of insulating material so sized as to be frictionally self-braced 'be-I tween opposite wall portions of the casing.

4. In a heater for liquid, a substantially.

cylindrical' casing, a bi-metallic thermostatic circuitl controller in the casingy and comprisin a strai lit conducting element arran ed vsu stantia y along the axis of the cylin er so as to be safely spaced from the walls thereof, supdporting means for said controller f comprising a block of insulat-V element an ing. material so sized as to be frictionally self-braced between opposite Wall pomme of the Casin and circuit terminals carried nected tof one end of said controllerl element,"

and the other thereof being positioned beneath theopposite end of said element.

5. In a leater for liquid, a substantiallyV by said blo, vone thereof being firmly concylindrical i uid-ti'ghtcasingadapted to be block of' insulating material so sized as to be rictionally self-braced along a vertical diameter between opposite wall portions of substantially along the axis ofthe cylinder the casing, said bloc-k being provided with means for supporting' one end of saidconducting element to permit the latter to pivot in a substantially ,horizontal plane.

In testimony whereot` I have hereuntoY set my hand.Y i Y FRANCIS EGAGELMAN. l

er so as to be safely spaced `from c V`said controller element and comprising* a 

